The patch titled
Subject: memory-hotplug: auto offline page_cgroup when onlining memory block failed
has been added to the -mm tree. Its filename is
memory-hotplug-auto-offline-page_cgroup-when-onlining-memory-block-failed.patch
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------------------------------------------------------
From: Wen Congyang <wency@xxxxxxxxxxxxxx>
Subject: memory-hotplug: auto offline page_cgroup when onlining memory block failed
When a memory block is onlined, we will try allocate memory on that node
to store page_cgroup. If onlining the memory block failed, we don't
offline the page cgroup, and we have no chance to offline this page cgroup
unless the memory block is onlined successfully again. It will cause that
we can't hot-remove the memory device on that node, because some memory is
used to store page cgroup. If onlining the memory block is failed, there
is no need to stort page cgroup for this memory. So auto offline
page_cgroup when onlining memory block failed.
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Jiang Liu <liuj97@xxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_cgroup.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN mm/page_cgroup.c~memory-hotplug-auto-offline-page_cgroup-when-onlining-memory-block-failed mm/page_cgroup.c
--- a/mm/page_cgroup.c~memory-hotplug-auto-offline-page_cgroup-when-onlining-memory-block-failed
+++ a/mm/page_cgroup.c
@@ -251,6 +251,9 @@ static int __meminit page_cgroup_callbac
mn->nr_pages, mn->status_change_nid);
break;
case MEM_CANCEL_ONLINE:
+ offline_page_cgroup(mn->start_pfn,
+ mn->nr_pages, mn->status_change_nid);
+ break;
case MEM_GOING_OFFLINE:
break;
case MEM_ONLINE:
_
Patches currently in -mm which might be from wency@xxxxxxxxxxxxxx are
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved.patch
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix.patch
acpi_memhotplugc-fix-memory-leak-when-memory-device-is-unbound-from-the-module-acpi_memhotplug.patch
acpi_memhotplugc-free-memory-device-if-acpi_memory_enable_device-failed.patch
acpi_memhotplugc-remove-memory-info-from-list-before-freeing-it.patch
acpi_memhotplugc-dont-allow-to-eject-the-memory-device-if-it-is-being-used.patch
acpi_memhotplugc-bind-the-memory-device-when-the-driver-is-being-loaded.patch
acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded.patch
x86-numa-dont-check-if-node-is-numa_no_node.patch
memory-hotplug-suppress-device-memoryx-does-not-have-a-release-function-warning.patch
memory-hotplug-suppress-device-nodex-does-not-have-a-release-function-warning.patch
memory-hotplug-skip-hwpoisoned-page-when-offlining-pages.patch
memory-hotplug-update-mce_bad_pages-when-removing-the-memory.patch
memory-hotplug-update-mce_bad_pages-when-removing-the-memory-fix.patch
memory-hotplug-auto-offline-page_cgroup-when-onlining-memory-block-failed.patch
memory-hotplug-fix-nr_free_pages-mismatch.patch
memory-hotplug-allocate-zones-pcp-before-onlining-pages.patch
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